CHICAGO, IL, September 11, 2012 – Littelfuse, Inc. (NASDAQ/NGS:LFUS), the global leader in circuit protection, today announced it had introduced TCMOV34S, SMOV34, and SMOV25 Series Varistor products designed to protect high energy circuits.

 

The new TCMOV34S Series Varistor is a 34mm-square-format varistor element (MOV) that combines high maximum surge capability (50kA) with an integrated thermally active element. It is designed specifically to protect high energy circuits from the short circuit (SCCR) conditions and Abnormal Overvoltage Intermediate Current conditions specified in the 3rd edition of UL1449. In addition to suppressing voltage transients by clamping them to a safe level, the TCMOV34S Series Varistor is designed to disconnect itself from the circuit safely in the event of overheating due to abnormal over-voltage conditions. A built-in micro-switch can be used to indicate when the Varistor is disconnected from the circuit.

 

The TCMOV34S Series Varistor is designed to facilitate compliance with the 3rd edition of UL1449 for surge protection devices (SPDs). It offers a short circuit current rating of 200kA, as well as high peak surge current handling (up to 50kA) and high energy absorption capabilities. It can be wave soldered without the need for special or expensive assembly processes. It is also lead-free and RoHS-compliant.

 

The new Littelfuse SMOV25 and SMOV34 Series Varistor lines are 25mm- and 34mm-square MOV devices respectively. Each has a thermal disconnect designed to open in the event of overheating due to abnormal overvoltage as outlined in the 3rd edition of UL1449. The close proximity of the integrated thermal element to the MOV body ensures a quick thermal response. These devices have a separate micro-switch that can be used to indicate when the MOV is disconnected from the circuit. Both SMOV Varistor Series are designed to disconnect themselves safely from the circuit in a sustained over-voltage, limited current condition as outlined in the 3rd edition of UL1449. Their standard operating voltage range is compatible with common AC line voltage (115VAC to 750VAC).

 

Like the TCMOV34S Series, the SMOV25 and SMOV34 Series Varistor lines are designed to facilitate compliance with the 3rd edition of UL1449 for surge protection devices (SPDs). They offer high peak surge current handling and high energy absorption capabilities. They are also lead-free and RoHS-compliant.

 

Applications for all three Varistor lines include use in surge protection devices, AC panel protection modules, power transfer switches, AC/DC power distribution systems, photovoltaic systems, and cell phone base stations.

 

“These new Varistor lines offer our customers a wider range of options and is another example of our commitment to provide the broadest and deepest portfolio of circuit protection products,” said Littelfuse Product Manager Johnny Chang.

 

Littelfuse, the leader in Varistor technology, provides a comprehensive range of products and solutions that provide overcurrent protection for any electronic application. With more than 80 years of experience in building and supplying overcurrent protection products, Littelfuse is dedicated to providing application expertise and support that meets or exceeds customers’ needs.

 

Availability

TCMOV34S, SMOV34 and SMOV25 Series Varistor samples are available now for bulk orders; sample requests through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit littelfuse.com.

 

About Littelfuse

Founded in 1927, Littelfuse, Inc., the worldwide leader in circuit protection, offers the industry’s broadest and deepest portfolio of circuit protection products and solutions. Littelfuse devices protect products in virtually every market that uses electrical energy, from consumer electronics to automobiles to industrial equipment. In addition to its Chicago, Illinois, world headquarters, Littelfuse has more than 30 sales, distribution, manufacturing and engineering facilities in the Americas, Europe and Asia. Technologies offered by Littelfuse include Fuses; Gas Discharge Tubes (GDTs); Positive Temperature Coefficient Devices (PTCs); Protection Relays; PulseGuard® ESD Suppressors; SIDACtor® Devices; TVS Diode Arrays (SPA™); Switching Thyristors; TVS Diodes and Varistors. The company also offers a comprehensive line of highly reliable Electromechanical and Electronic Switch and Control Devices for commercial and specialty vehicles, as well as Protection Relays and underground Power Distribution Centers for safe control and distribution of electricity in mining operations.

 

For more information, please visit our website at http://www.littelfuse.com/

Companies Website:
http://www.littelfuse.com/

Littelfuse News Release

• Littelfuse Introduces First 277V Fuse Certified to UL913

  2014/03/27Littelfuse  Passive / Connections / mechanical parts

• Unidirectional Open LED Protector from Littelfuse Prevents Damage from Reverse Polarity Voltages

  2014/02/18Littelfuse  LED

• New Packaging Options for Littelfuse SP3012 Series TVS Diode Arrays Provide Greater Layout Flexibility

  2013/12/13Littelfuse  Passive / Connections / mechanical parts

• Littelfuse Receives 2012 Excellent Quality Supplier Award From Dahua Technology

  2012/11/02Littelfuse  Company / Market Trends

• SP1008 Series TVS Diode Arrays Safely Absorb Repetitive ±15kV ESD Strikes in a Miniature 0201 Footprint, Ensure Greater ESD Protection for Space-Limited Applications

  2012/09/14Littelfuse  Analog

Related News Release

• STMicroelectronics’ failsafe comparators with guaranteed start-up time boost reliability and power savings

  2024/12/03  STMicroelectronics  Analog

• Flexible, space-saving class-D amplifier for in-car audio, from STMicroelectronics, adds automotive-optimized diagnostics

  2024/09/30  STMicroelectronics  Analog

• ROHM Group Company SiCrystal and STMicroelectronics Expand Silicon Carbide Wafer Supply Agreement

  2024/04/23  STMicroelectronics  Analog

• STMicroelectronics’ SiC-based digital power solution selected by Compuware for high-efficiency and reliable server power supply

  2024/04/02  STMicroelectronics  Analog

• STMicroelectronics boosts silicon power performance with automotive-grade MDmesh DM9 super-junction MOSFETs

  2024/03/18  STMicroelectronics  Analog